EP1826914B1 - Hochfrequenzschaltung, hochfrequenzschaltungskomponenten und kommunikationsvorrichtung damit - Google Patents
Hochfrequenzschaltung, hochfrequenzschaltungskomponenten und kommunikationsvorrichtung damit Download PDFInfo
- Publication number
- EP1826914B1 EP1826914B1 EP05814211.8A EP05814211A EP1826914B1 EP 1826914 B1 EP1826914 B1 EP 1826914B1 EP 05814211 A EP05814211 A EP 05814211A EP 1826914 B1 EP1826914 B1 EP 1826914B1
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- EP
- European Patent Office
- Prior art keywords
- circuit
- frequency
- transmitting
- wireless lan
- receiving
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/3805—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving with built-in auxiliary receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
- H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
Definitions
- the present invention relates to a wireless communications apparatus for performing wireless transmission between electronic or electric equipments, particularly to a high-frequency circuit commonly usable in at least two communications systems using substantially the same frequency band, a high-frequency device comprising such a high-frequency circuit, and a communications apparatus comprising such a high-frequency device.
- An industrial, scientific and medical (ISM) band at 2.4 GHz is used in wireless LAN (WLAN) communications according to the IEEE 802.11 standard, such as direct sequence spread spectrum (DSSS) wireless communications, etc.
- DSSS direct sequence spread spectrum
- BluetoothTM an extremely convenient technology capable of making connection between associated electronic equipments without using a cable, in an ISM band of 2.4 GHz, the same as in the wireless LAN (WLAN).
- a major wireless LAN standard utilizing an ISM band of 2.4 GHz has IEEE 802.11b and IEEE 802.11g.
- the IEEE 802.11b is a DSSS system, supporting high-speed communications at 5.5 Mbps and 11 Mbps.
- the IEEE 802.11g uses an orthogonal frequency division multiplex (OFDM) modulation system, supporting high-speed data communications at 54 Mbps at maximum.
- OFDM orthogonal frequency division multiplex
- Bluetooth divides the ISM frequency band of 2.4 GHz to pluralities of wireless channels, each of which is then divided by a unit time (1/1600 seconds) to time slots.
- the wireless channels used are switched by the time slots to provide a frequency-hopping system with excellent noise resistance.
- Wireless LAN utilized by small groups in a short distance range within about 50-100 m has such a high data transmission speed as several Mbps to several tens of Mbps, consuming power of about 100 mW.
- Bluetooth utilized in a relatively narrow area such as the same compound or building, etc., however, the reach of electromagnetic waves is as short as about 10 m, and its transmission speed is 2 Mbps at most, with as small power consumption as about 10 mW. Because wireless LAN and Bluetooth are different in transmission speed and reach, etc., both of them may be used in one communications apparatus, so that a more advantageous one is used depending on applications.
- wireless LAN IEEE 802.11b, IEEE 802.11g
- Bluetooth as a second communications system.
- JP2001-24579 A discloses a circuit usable for both circuits of wireless LAN and Bluetooth, which comprises a first switch circuit for switching the connection of a first antenna port to a transmitting circuit for a first communications system and a second switch circuit, the second switch circuit switching the connection of the receiving circuit of the first communications system to the first switch circuit and a third switch circuit, the third switch circuit switching the connection of the second antenna port to a transmitting/receiving circuit for the second communications system and the second switch circuit; a first filter disposed between the first switch circuit and a transmitting circuit for the first communications system; and a second filter disposed between the second switch circuit and the receiving circuit of the first communications system, as shown in Fig. 35 .
- JP2002-208874 A discloses composite wireless device using substantially the same frequency band, which comprises a first splitter for inputting first and second outputs, a power amplifier for inputting the output of the first splitter, an antenna switch for inputting the output of the power amplifier, a low-noise amplifier on the receiving side of the antenna switch, and a second splitter for inputting the output of the low-noise amplifier, the transmitting circuit having such a structure that an output one of different two transmitting signals is selected by the first splitter and then amplified by the power amplifier, and the receiving circuit having such a structure that received waves are distributed to two signals by the second splitter disposed on the output side of the low-noise amplifier, as shown in Fig. 36 .
- the power amplifier and the low-noise amplifier are used for both signals.
- the power amplifier is used for both the transmitting waves of wireless LAN and the transmitting waves of Bluetooth.
- recent Bluetooth having low transmitting output power does not need a power amplifier, such common use has become unnecessary.
- EP 1 418 680 A1 discloses a circuit for connecting communication systems using different frequency bands.
- the preamble of claim 1 defines the features common to the present application and EP 1418680 A1 .
- an object of the present invention is to provide a high-frequency circuit capable of being used for both wireless LAN and Bluetooth, particularly to a high-frequency circuit that can be miniaturized because of a small number of parts, and a high-frequency circuit device and a communications apparatus comprising such a high-frequency circuit.
- the high-frequency circuit device of the present invention having the high-frequency circuit as defined in the present set of claims is constituted by a laminate of dielectric ceramics and electrode patterns, and at least one semiconductor element mounted on the laminate; (a) the electrode patterns constituting at least part of inductance elements and/or capacitance elements, which mainly constitute (1) at least one of the first bandpass filter and the balanced-unbalanced conversion circuit, (2) at least one of the first bandpass filter and the splitter or coupler circuit, or (3) at least one of the first bandpass filter, the balanced-unbalanced conversion circuit and the splitter or coupler circuit, and (b) the semiconductor elements constituting (1) the high-frequency switch circuit, or (2) the high-frequency switch circuit and/or the high-frequency power amplifier circuit.
- the second bandpass filter When used, it is preferably constituted by the electrode patterns in the laminate.
- the inductance elements and/or capacitance elements for the circuits may be constituted by electrode patterns in the laminate or mounted on the laminate, they are preferably disposed in the laminate for the miniaturization of the high-frequency circuit device and the reduction of the number of parts.
- the high-frequency switch circuit may be structured as one semiconductor element and mounted on the laminate.
- the high-frequency switch circuit may be constituted by semiconductor elements, and inductance elements and/or capacitance elements, with at least part of the inductance elements and/or the capacitance elements formed by electrode patterns in the laminate.
- a semiconductor element constituting the high-frequency power amplifier circuit may be mounted on the laminate, and its control power source circuit, a matching circuit, etc. may be constituted by inductance elements, capacitance elements and/or resistance elements, with at least part of the inductance elements and/or the capacitance elements formed in the laminate.
- resistance elements may be used and mounted on the laminate.
- the communications apparatus of the present invention comprises any one of the high-frequency circuits, or any one of the high-frequency circuit devices defined by the present set of claims.
- the communications apparatus of the present invention are personal computers (PCs), PC peripherals such as PCMCIA cards, printers, hard disk drives and broadband rooters, FAXs, refrigerators, standard-definition televisions (SDTVs), high-definition televisions (HDTVs), digital cameras, digital video cameras, mobile phones, etc.
- Fig. 1 shows the circuit of a communications apparatus usable for both wireless LAN and Bluetooth according to an example of the present invention.
- a first communications system is wireless LAN usable for IEEE 802.11b and/or IEEE 802.11g
- a second communications system is Bluetooth
- the same reference numerals are assigned to parts with the same or similar functions. Accordingly, the same reference numerals do not necessarily mean completely the same parts.
- the high-frequency circuit shown in Fig. 1 comprises an antenna ANT capable of transmitting and receiving in wireless LAN and Bluetooth, a high-frequency switch circuit 1 for switching the three-way connection of the antenna ANT to a transmitting circuit 11bg-T of wireless LAN, a receiving circuit 11bg-R of wireless LAN, and a transmitting/receiving circuit BLT-TR of Bluetooth, a first bandpass filter 2 disposed between the antenna ANT and the high-frequency switch circuit 1, a balanced-unbalanced conversion circuit 3 disposed between the receiving circuit 11bg-R of wireless LAN and the high-frequency switch circuit 1, a high-frequency power amplifier circuit 6 disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency switch circuit 1, and a second bandpass filter 7 disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency power amplifier circuit 6.
- a bandpass filter that was necessary between the high-frequency power amplifier circuit 6 and the antenna ANT to suppress harmonics and thermal noise from the high-frequency power amplifier circuit 6, a bandpass filter that was necessary between the antenna ANT and the balanced-unbalanced conversion circuit 3 to suppress signal components other than a received signal to enhance the receiving sensitivity, and a bandpass filter that was necessary between the antenna ANT and the transmitting/receiving circuit BLT-TR of Bluetooth are integrated into one first bandpass filter 2, through which the transmitting and receiving signals of wireless LAN and the transmitting and receiving signals of Bluetooth pass, between the high-frequency switch circuit 1 and the antenna ANT.
- it has a simplified circuit structure.
- a second bandpass filter 7 may be disposed, if necessary, between the transmitting circuit 11bg-T of wireless LAN and the high-frequency power amplifier circuit 6. Also, the arrangement of a balanced-unbalanced conversion circuit 3 in a path between the high-frequency switch circuit 1 and the receiving circuit 11bg-R of wireless LAN has the circuit balanced to improve the noise resistance of the receiving circuit 11bg-R of wireless LAN, without increasing loss in a path between the antenna ANT and the transmitting circuit 11bg-T of wireless LAN, and in a path between antenna ANT and the transmitting/receiving circuit BLT-TR of Bluetooth.
- a balanced-unbalanced conversion circuit 4 need only be disposed between the transmitting/receiving circuit BLT-TR of Bluetooth and the high-frequency switch circuit 1, as shown in Fig. 2 .
- Fig. 3 shows a high-frequency circuit according to another example of the present invention, which may be contained in a communications apparatus usable for both wireless LAN and Bluetooth.
- This high-frequency circuit comprises a high-frequency switch circuit 1 for switching the three-way connection of an antenna ANT capable of transmitting and receiving signals of wireless LAN and Bluetooth to a transmitting circuit 11bg-T of wireless LAN, a transmitting circuit BLT-T of Bluetooth, and a connecting point P1 of a receiving circuit of wireless LAN and a receiving circuit of Bluetooth, a first bandpass filter 2 disposed between the antenna ANT and the high-frequency switch circuit 1, a splitter circuit 9 disposed between the connecting point P1 and the receiving circuit 11bg-R of wireless LAN and the receiving circuit BLT-R of Bluetooth, a balanced-unbalanced conversion circuit 3 disposed between the receiving circuit 11bg-R of wireless LAN and the splitter circuit 9, a balanced-unbalanced conversion circuit 4 disposed between the receiving circuit BLT-R of Bluetooth and the splitter circuit 9,
- a bandpass filter that was necessary between the high-frequency power amplifier circuit 6 and the antenna ANT to suppress harmonics and thermal noise generated from the high-frequency power amplifier circuit 6 a bandpass filter that was necessary between the antenna ANT and the balanced-unbalanced conversion circuit 3 to suppress signal components other than a received signal to enhance the receiving sensitivity, a bandpass filter that was necessary between the antenna ANT and the balanced-unbalanced conversion circuit 4 to suppress signal components other than a received signal to enhance the receiving sensitivity, and a bandpass filter that was necessary between the transmitting circuit BLT-T of Bluetooth and the antenna ANT to suppress harmonics and thermal noise generated from the transmitting circuit BLT-T of Bluetooth are integrated into one first bandpass filter 2,through which the transmitting and receiving signals of wireless LAN and the transmitting and receiving signals of Bluetooth pass, between the high-frequency switch circuit 1 and the antenna ANT.
- it has a simplified circuit structure.
- a second bandpass filter 7 may be disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency power amplifier circuit 6. Also, the arrangement of the splitter circuit 9 at P1 common to the receiving circuit of wireless LAN and the receiving circuit of Bluetooth makes it possible to receive both signals for wireless LAN and Bluetooth.
- the circuit can be turned to a balanced circuit providing the receiving circuit 11bg-R of wireless LAN and the receiving circuit BLT-R of Bluetooth with improved noise resistance, without increasing loss in the path between the antenna ANT and the transmitting circuit 11bg-T of wireless LAN, and in the path between the antenna ANT and the transmitting circuit BLT-T of Bluetooth.
- a balanced-unbalanced conversion circuit 5 need only be disposed between the transmitting circuit BLT-T of Bluetooth and the high-frequency switch circuit 1, as shown in Fig. 4 .
- Fig. 5 shows a high-frequency circuit according to another example of the present invention, which is contained in a communications apparatus usable for both wireless LAN and Bluetooth.
- This high-frequency circuit comprises an antenna ANT capable of transmitting and receiving signals of wireless LAN and Bluetooth, a high-frequency switch circuit 1 for switching the two-way connection of the antenna ANT to a transmitting circuit 11bg-T of wireless LAN, and a connecting point P1 of a receiving circuit 11bg-R of wireless LAN and a transmitting/receiving circuit BLT-TR of Bluetooth, a first bandpass filter 2 disposed between the antenna ANT and the high-frequency switch circuit 1, and a splitter circuit 9 disposed between the connecting point P1 and the receiving circuit 11bg-R of wireless LAN and the transmitting/receiving circuit BLT-TR of Bluetooth.
- a balanced-unbalanced conversion circuit 3 is disposed between the receiving circuit 11bg-R of wireless LAN and the splitter circuit 9, and a balanced-unbalanced conversion circuit 4 is disposed the transmitting/receiving circuit BLT-TR of Bluetooth and the splitter circuit 9.
- a high-frequency power amplifier circuit 6 is disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency switch 1.
- a bandpass filter that was necessary between the high-frequency power amplifier circuit 6 and the antenna ANT to suppress harmonics and thermal noise generated from the high-frequency power amplifier circuit 6 a bandpass filter that was necessary between the antenna ANT and the balanced-unbalanced conversion circuit 3 to suppress signal components other than a received signal to enhance the receiving sensitivity, and a bandpass filter that was necessary between the antenna ANT and the transmitting/receiving circuit BLT-TR of Bluetooth are integrated into the first bandpass filter 2, through which the transmitting signal of wireless LAN, the received signal of wireless LAN and the transmitting/receiving signals of Bluetooth pass, between the high-frequency switch 1 and the antenna ANT.
- the first bandpass filter 2 through which the transmitting signal of wireless LAN, the received signal of wireless LAN and the transmitting/receiving signals of Bluetooth pass, between the high-frequency switch 1 and the antenna ANT.
- the arrangement of the balanced-unbalanced conversion circuit 3 between the splitter circuit 9 and the receiving circuit 11bg-R of wireless LAN is adapted to a balanced circuit for improving the noise resistance of the receiving circuit 11bg-R of wireless LAN, without increasing loss in a path between the antenna ANT and the transmitting circuit 11bg-T of wireless LAN.
- a balanced-unbalanced conversion circuit 4 need only be disposed between the transmitting/receiving circuit BLT-TR of Bluetooth and the splitter circuit 9.
- the high-frequency circuit shown in Fig. 5 is branched by the splitter circuit 9 to the receiving circuit 11bg-R of wireless LAN and the transmitting/receiving circuit BLT-TR of Bluetooth, it can simultaneously receive signals of wireless LAN and Bluetooth.
- a coupler circuit may be used in place of the splitter circuit 9. Even when the coupler circuit is used, the signals of wireless LAN and Bluetooth can be simultaneously received.
- a distribution ratio of the receiving circuit 11bg-R of wireless LAN to the transmitting/receiving circuit BLT-TR of Bluetooth can be changed to, for instance, 5:1 or 10:1, to properly set the ratio of the signal of Bluetooth to the signal of wireless LAN.
- the minimum receiving sensitivity at a short distance is -70 dBm in Bluetooth, much lower than -65 dBm in wireless LAN. Accordingly, the simultaneous receiving of the signal of wireless LAN and the signal of Bluetooth can be efficient conducted by distributing less signals to the receiving circuit of Bluetooth needing only small power and more signals to the receiving circuit of wireless LAN needing large power, using the coupler circuit.
- the balanced-unbalanced conversion circuit 4 between the transmitting/receiving circuit BLT-TR of Bluetooth and the splitter circuit 9 may be omitted as shown in Fig. 6 , and a balanced-unbalanced conversion circuit 12 may be disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency power amplifier circuit 6 as shown in Fig. 7 .
- the balanced-unbalanced conversion circuit 12 causes a terminal for the transmitting circuit 11bg-T of wireless LAN to act as a balance terminal, thereby making it adaptable to a balanced circuit for the improvement of noise resistance.
- a bandpass filter 7 may be disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency power amplifier circuit 6. With the band filter 7, local signal noise generated from the transmitting circuit of RF-IC for wireless LAN can be removed. It is noted that the addition and combination of these circuit elements can be properly modified.
- Fig. 9 shows a high-frequency circuit according to embodiment of the present invention, which is contained in a communications apparatus usable for both wireless LAN and Bluetooth.
- This high-frequency circuit comprises an antenna ANT capable of transmitting and receiving signals of wireless LAN and Bluetooth, a high-frequency switch circuit 1 for switching the two-way connection of the antenna ANT to transmitting and receiving circuits 11bg-T, 11bg-R of wireless LAN, a first bandpass filter 2 disposed between the antenna ANT and the high-frequency switch circuit 1, a coupler circuit 11 disposed between the high-frequency switch circuit 1 and the first bandpass filter 2 and connected to a transmitting/receiving circuit BLT-TR of Bluetooth, a balanced-unbalanced conversion circuit 3 disposed between the receiving circuit 11bg-R of wireless LAN and the high-frequency switch circuit 1, and a high-frequency power amplifier circuit 6 disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency switch circuit 1.
- a bandpass filter that was necessary between the high-frequency power amplifier circuit 6 and the antenna ANT to suppress harmonics and thermal noise generated from the high-frequency power amplifier circuit 6 a bandpass filter that was necessary between the antenna ANT and the balanced-unbalanced conversion circuit 3 to suppress signal components other than a received signal to enhance the receiving sensitivity, and a bandpass filter that was necessary between the antenna ANT and the transmitting/receiving circuit BLT-TR of Bluetooth are integrated into one first bandpass filter 2 between the high-frequency switch 1 and the antenna ANT.
- it has a simplified circuit structure.
- the arrangement of the balanced-unbalanced conversion circuit 3 between the high-frequency switch circuit 1 and the receiving circuit 11bg-R of wireless LAN makes the receiving circuit 11bg-R adaptable to a balanced circuit for improving the noise resistance of the receiving circuit 11bg-R of wireless LAN, without increasing loss in a path between the antenna ANT and the transmitting circuit 11bg-T of wireless LAN.
- the coupler circuit 11 is disposed between the high-frequency switch circuit 1 and the first bandpass filter 2 in Fig. 9 , it may be disposed between the antenna ANT and the first bandpass filter 2, and a splitter circuit may be used in place of the coupler circuit 11.
- the arrangement of a circuit branching to the transmitting/receiving circuit BLT-TR of Bluetooth in an antenna top portion upstream of the high-frequency switch circuit 1 makes it possible to simultaneously perform the transmitting and receiving of signals for both communications systems of wireless LAN and Bluetooth, without increasing the number of antennas.
- the connection of the antenna ANT to the transmitting/receiving circuit BLT-TR of Bluetooth does not need a new switch circuit, thereby avoiding increase in the number of switch control circuits.
- the ratio of the signal of Bluetooth to the signal of wireless LAN can be properly set by changing the distribution ratio of the circuit of wireless LAN to the circuit of Bluetooth. Because the minimum receiving sensitivity is -70 dBm in Bluetooth, much lower than -65 dBm in wireless LAN, the coupler circuit can distribute less signal to the circuit of Bluetooth needing only small power and more signal to the circuit of wireless LAN needing large power to conduct efficient transmission and receiving of signals.
- a balanced-unbalanced conversion circuit 4 may be disposed between the transmitting/receiving circuit BLT-TR of Bluetooth and the coupler circuit 11 as shown in Fig. 10 .
- a balanced-unbalanced conversion circuit is disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency power amplifier circuit 6, and when a terminal for the transmitting circuit 11bg-T of wireless LAN is used as a balance terminal, a balanced circuit with improved noise resistance can be obtained. Also, when a bandpass filter is disposed between the transmitting circuit 11bg-T of wireless LAN and the high-frequency power amplifier circuit 6, noise from the transmitting circuit 11bg-T of wireless LAN can be removed. It is noted that the addition and combination of these circuit elements may be properly modified.
- Fig. 11 shows the equivalent circuit of a high-frequency circuit of Fig. 1 .
- the first bandpass filter 2 is disposed between the antenna port ANT and the high-frequency switch circuit 1, and constituted by magnetically coupled inductance elements Lp1, Lp2 and capacitance elements Cp1, Cp2, Cp3, Cp4, Cp5, Cp6, Cp7.
- the first bandpass filter 2 attenuates harmonics generated from the high-frequency power amplifier 6 or the high-frequency switch circuit 1 when transmitting, and attenuates signals outside the frequencies used for receiving in wireless LAN and Bluetooth when receiving.
- the balanced-unbalanced conversion circuit 3 is connected to the high-frequency switch circuit 1 via a matching circuit Lbb.
- the matching circuit Lbb which is necessary for matching between the bandpass filter 2 and the balanced-unbalanced conversion circuit 3, is not restricted to the depicted arrangement, but may be disposed between the high-frequency switch circuit 1 and the bandpass filter 2.
- Part of the balanced-unbalanced conversion circuit 3 on the side of the high-frequency switch circuit 1 is an unbalanced circuit constituted by inductance elements Lb1a, Lb1b, and the other part of the balanced-unbalanced conversion circuit 3 on the side of the receiving circuits 11bg-R+, 11bg-R- of wireless LAN is a balanced circuit constituted by inductance elements Lb2, Lb3 and a capacitance element Cb1. Signals ideally having the same amplitude with 180° phase difference are output from the receiving circuits 11bg-R+ and 11bg-R- of wireless LAN.
- a capacitance element Cb1 which looks short-circuited at a high frequency is disposed between the connecting point of the inductance elements Lb2 and Lb3 and the ground, DC voltage is applied from a DC (NC) port, and DC voltage can be output from a 11bg-R+ port and a 11bg-R- port.
- the balanced-unbalanced conversion circuit 3 may be provided with an impedance-converting function.
- a detection circuit 8 for monitoring power output from a high-frequency power amplifier circuit 6, the high-frequency power amplifier circuit 6 for amplifying the power of the transmitting signal from the transmitting circuit 11bg-T of wireless LAN, and a second bandpass filter 7 comprising magnetically coupled inductance elements Lt1, Lt2 and capacitance elements Ct1, Ct2, Ct3, Ct4, Ct5, Ct6, in this order from the side of the high-frequency switch circuit 1.
- the second bandpass filter 7 attenuates signals outside the frequencies of the transmitting signal of wireless LAN inputted from the transmitting circuit 11bg-T of wireless LAN.
- Figs. 12-16 exemplify the equivalent circuits of the high-frequency switches 1.
- These high-frequency switch circuits 1 are depicted by usual symbols with their explanation omitted. They are mainly constituted by switching elements such as field-effect transistors (FETs), diodes, etc., properly with inductance elements including transmission lines, and capacitance elements.
- FETs field-effect transistors
- high-frequency switch circuits for switching two paths may be connected in series to improve the isolation, thereby constituting the high-frequency switch circuits 1.
- Examples of such high-frequency switch circuits 1 are shown in Figs. 14-16 .
- ports are connected by voltage applied to control terminals V1-V4 as shown in Table 2.
- ports are connected by voltage applied to control terminals V1 and V3 as shown in Table 3.
- switch circuits for turning on or off one path may be disposed in series or in a grounded manner in a path between a terminal 1c connected to the receiving circuit 11bg-R of wireless LAN and a terminal 1a connected to the antenna to improve the isolation.
- Fig. 17 shows an example in which a PIN diode is connected between a terminal 1c and the ground.
- ports are connected by voltage applied to control terminals V1, V2, V3, V4 as shown in Table 2.
- Fig. 18 shows one example of the equivalent circuits of the high-frequency power amplifier circuit 6 connected between the transmitting circuit 11bg-T of wireless LAN and the detection circuit 8.
- the high-frequency power amplifier circuit 6 comprises an input-matching circuit 61, a power amplifier circuit 62 having two-stage transistors, a voltage supply circuit 63 for supplying a constant voltage, a bias control circuit 64 for controlling the output power of the high-frequency power amplifier circuit 6, and an output-matching circuit 65.
- Inductance elements and capacitance elements are used in the circuits 61-65.
- the circuits 61-65 may be constituted by a microwave monolithic integrated circuit (MMIC).
- MMIC microwave monolithic integrated circuit
- Fig. 19 shows one example of the equivalent circuits of the detection circuit 8 connected between the high-frequency switch circuit 1 and the high-frequency power amplifier circuit 6.
- the detection circuit 8 comprises a directional coupler 81 comprising a main line, a sub-line and a resistance element, a matching circuit 82 comprising a grounded inductance element and a phase circuit, a resistance element 83, a Schottky diode 84, and a voltage-smoothing circuit 85 comprising a resistance element and a capacitor element.
- the coupler 81 may be constituted by capacitors, and the matching circuit 82 may be constituted by a phase circuit. DC voltage corresponding to the output power of the high-frequency power amplifier circuit 6 is output from Vdet.
- the detection circuit 8 may be integrated with the high-frequency power amplifier circuit 6.
- Fig. 20 shows the equivalent circuit of a portion 10 (corresponding to the high-frequency circuit device) encircled by a broken line in the high-frequency circuit shown in Fig. 5 .
- the first bandpass filter 2 disposed between the antenna port ANT and the high-frequency switch circuit 1 comprises magnetically coupled inductance elements lrb1, lrb2, and capacitance elements crb1, crb2, crb4, crb5, crb6, crb7.
- a highpass filter 2b Connected to the first bandpass filter 2 on the side of the antenna port ANT is a highpass filter 2b comprising an inductance element lh1 and capacitance elements ch1, ch3.
- the highpass filter 2b which attenuates signals outside the passband of the first bandpass filter 2, may be regarded as a bandpass filter comprising the highpass filter 2b and the first bandpass filter 2.
- the highpass filter 2b and the first bandpass filter 2 attenuate harmonics generated from the high-frequency power amplifier 6 or the high-frequency switch circuit 1 during transmission, and attenuate signals outside the frequencies used in wireless LAN and Bluetooth during receiving.
- the bandpass filter 2 is connected to the high-frequency switch circuit 1 of SPDT.
- the first path of the high-frequency switch circuit 1 is connected to the high-frequency power amplifier circuit 6, which is connected to the transmitting circuit 11bg-T of wireless LAN via a capacitance element ct.
- the second path of the high-frequency switch circuit 1 is connected to the splitter circuit 9 comprising inductance elements lsp1, lsp2, a resistance element rsp and a capacitance element csp1, via a capacitance element cs.
- the splitter circuit 9 distributes signals to the receiving circuit 11bg-R of wireless LAN and the transmitting/receiving circuit BLT-TR of Bluetooth.
- Connected via the matching circuit lb2 to the splitter circuit 9 on the side of the receiving circuit 11bg-R of wireless LAN is a balanced-unbalanced conversion circuit 3 having balance terminals 11bg-R+, 11bg-R-.
- the balanced-unbalanced conversion circuit 3 comprises inductance elements lb3, lb6, lb11, lb15 and a capacitance element cb2.
- a part of the balanced-unbalanced conversion circuit 3 on the side of the receiving circuit 11bg-R of wireless LAN is a balanced circuit, balance terminals 11bg-R+, 11bg-R- of which output signals ideally having the same amplitude with a 180° phase difference.
- Disposed between the connecting point of the inductance elements lb11 and lb15 and the ground is a capacitance element cb2, which looks short-circuited in high frequencies.
- a DC port for applying DC voltage to the connecting point may output DC voltage from its balance terminals 11bg-R+, 11bg-R-.
- the balanced-unbalanced conversion circuit 3 may be provided with an impedance-converting function.
- the balanced-unbalanced conversion circuit 4 Connected via the matching circuit lb21 to the splitter circuit 9 on the side of the transmitting/receiving circuit BLT-TR of Bluetooth is a balanced-unbalanced conversion circuit 4 having balance terminals BLT-TR+, BLT-TR-.
- the balanced-unbalanced conversion circuit 4 comprises inductance elements lb22, lb26, lb31, lb36 and a capacitance element cb3.
- Figs. 21-23 show the equivalent circuits of the high-frequency switch circuits 1.
- These high-frequency switches 1 are depicted by usual symbols, with their explanation omitted. They comprise switching elements such as field-effect transistors (FET), diodes, etc. as main components, with proper inductance elements including transmitting lines, and capacitance elements.
- FET field-effect transistors
- ports are connected by voltage applied from control terminals Vc1, Vc2, as shown in Table 5.
- ports are connected by voltage applied from a control terminal Vc1, as shown in Table 6.
- "High” represents voltage in a range of 2.5-4 V
- "Low” represents voltage in a range of 0-0.5 V.
- Connection Mode Vc1 Between Ports 1a-1b Between Ports 1a-1c 1 Low Connected Disconnected 2 High Disconnected Connected
- Fig. 24 shows one example of the equivalent circuits of the high-frequency power amplifier circuit 6.
- the high-frequency power amplifier circuit 6 comprises an input-matching circuit, a power amplifier circuit, a voltage supply circuit, a bias control circuit, an output-matching circuit, and a detection circuit. DC voltage corresponding to the output power of the high-frequency power amplifier circuit 6 is output from Vdet terminal.
- Fig. 25 shows one example of the coupler circuit 11.
- the coupler circuit 11 comprises a main line lsc1 disposed between a port P3 connected to the high-frequency switch circuit 1 and a port P2 connected to the filter circuit 2, and a sub-line lsc2 coupled to the main line lsc1.
- the sub-line lsc2 has one end connected to the transmitting/receiving circuit BLT-TR of Bluetooth, and the other end connected to a ground electrode via a resistor rc1.
- the balanced-unbalanced conversion circuit 4 having the already explained equivalent circuit may be connected between the coupler circuit 11 and the transmitting/receiving circuit BLT-TR of Bluetooth, as shown in Fig. 10 .
- the high-frequency circuit device of the present invention comprises a laminate of dielectric ceramic layers with electrode patterns, and at least one semiconductor element mounted on the laminate.
- Fig. 26 shows the appearance of the high-frequency circuit device 10 having the high-frequency circuit shown in Figs. 1 and 11
- Fig. 27 shows a bottom surface of the laminate substrate 100 of the high-frequency circuit device 10
- Fig. 28 shows the structure of each layer in the laminate substrate 100.
- This high-frequency circuit device 10 comprises the high-frequency switch circuit 1, the first bandpass filter 2, the balanced-unbalanced conversion circuit 3, the high-frequency power amplifier circuit 6, and the detection circuit 8.
- An upper surface of the laminate substrate 100 is provided with pluralities of land electrodes, on which chip parts not contained in the laminate substrate 100 are mounted, and the high-frequency switch circuit 1, the high-frequency power amplifier circuit 6, the Schottky diode 83, the chip capacitors 91, 94, 96, and the chip resistors 92, 93, 95 are mounted on the land electrodes as shown in Fig. 26 .
- the land electrodes are connected to connecting lines and circuit elements in the laminate substrate 100 through via-holes.
- the high-frequency switch circuit 1 may be mounted in a bare state on the land electrode of the laminate substrate 100, and sealed with a resin or a pipe. Miniaturization can be achieved by constituting the high-frequency circuit device 10 by the laminate substrate 100 and parts mounted thereon. Of course, RF-IC and baseband IC constituting the transmitting/receiving circuit may be integrated in the laminate substrate 100.
- the laminate substrate 100 is made of dielectric ceramics sinterable at as low temperatures as, for instance, 1000°C or lower.
- the laminate substrate 100 may be produced by printing each ceramic green sheet as thick as 10-200 ⁇ m with a conductive paste of low-resistivity Ag, Cu, etc. to form predetermined electrode patterns, integrally laminating pluralities of green sheets with electrode patterns, and sintering the resultant laminate.
- the dielectric ceramics include, for instance, (a) dielectric ceramics comprising Al, Si and Sr as main components, and Ti, Bi, Cu, Mn, Na, K, etc. as sub-components, (b) dielectric ceramics comprising Al, Si and Sr as main components, and Ca, Pb, Na, K, etc. as sub-components, (c) dielectric ceramics comprising Al, Mg, Si and Gd, (d) dielectric ceramics comprising Al, Si, Zr and Mg, etc.
- the dielectric ceramics preferably have dielectric constants of about 5-15.
- resins, or composites of resins and dielectric ceramic powder may be used. According to an HTCC (high-temperature co-fired ceramic) method, dielectric ceramic substrates based on Al 2 O 3 are provided with high-temperature-sinterable metal patterns of tungsten, molybdenum, etc., and integrally sintered.
- An uppermost green sheet 201 is provided with land electrodes, on which parts are mounted, and second to 16th green sheet layers 202-216 are provided with line electrodes, capacitor electrodes and ground electrodes, which are connected through via-holes (shown by black circles in the figure) formed in the green sheets.
- the lowermost green sheet 216 is provided with a wide ground electrode GND, a bottom surface of which has terminal electrodes to be mounted on a circuit board.
- Fig. 27 Disposed on the bottom surface of the laminate substrate 100 are, as shown in Fig. 27 , two ground electrodes GND in a center portion, an antenna port ANT in a periphery, the transmitting port 11gb-T of wireless LAN, the receiving ports 11bg-R+, 11bg-R- of wireless LAN, a transmitting/receiving port BLT-TR of Bluetooth, a ground port GND, control ports V1, V2, V3 for the high-frequency switch circuit 1, power source ports Vc, Vb for the high-frequency power amplifier circuit, and a output voltage port Vdet of the detection circuit.
- Each terminal electrode is depicted by the same symbols as in Fig. 11 .
- the terminal electrodes are in a land grid array (LGA) in the embodiment, they may be in a ball grid array (BGA), etc.
- LGA land grid array
- BGA ball grid array
- Fig. 30 shows the appearance of a high-frequency circuit device 10 comprising a laminate substrate 100 having the high-frequency circuit (equivalent circuit) shown in Figs. 5 and 20
- Figs. 31(a)-(c) show the structure of each layer in the laminate substrate 100.
- the high-frequency circuit device 10 comprises a high-frequency switch circuit 1, a first bandpass filter 2, balanced-unbalanced conversion circuits 3, 4, a high-frequency power amplifier circuit 6 having a detection circuit, and a splitter circuit 9.
- the high-frequency switch circuit 1 is as shown in Fig. 21
- the high-frequency power amplifier circuit 6 is as shown in Fig. 24 .
- a high-frequency switch circuit 1 of SPDT mounted on pluralities of land electrodes on the upper surface of the laminate substrate 100 .
- a power amplifier circuit part PA for the high-frequency power amplifier circuit 6 chip capacitors cb3, cs, c3, c9, c8, c30, ct, c1, c4, c5, c6, and chip resistors rsp, rl.
- the land electrodes are connected to connecting lines and circuit elements in the laminate substrate 100 through via-holes.
- chip capacitors and chip resistors are mounted on the upper surface of the laminate substrate 100 in Fig. 30 , they may be formed in the laminate substrate 100.
- the high-frequency switch circuit 1 and the power amplifier circuit part PA may be mounted in a bare state on the land electrodes of the laminate substrate, and sealed with a resin to provide the high-frequency circuit device 10. Miniaturization is thus achieved by constituting the high-frequency circuit device in the form of a laminate substrate.
- RF-IC and baseband IC constituting the transmitting/receiving circuit parts may be integrated in the laminate substrate 100.
- an uppermost (first) green sheet 301 in the laminate substrate 100 is provided with land electrodes on which parts are mounted, an electrode csp1 for a capacitance element, and electrodes lsp2e, lsp1e for inductance elements.
- a second green sheet layer 302 is provided with a ground electrode e3.
- a third green sheet layer 303 is provided with electrodes crb1a, crb5a for capacitance elements, electrodes lb21, li4 for inductance elements, and a ground electrode e4.
- a fourth green sheet layer 304 is provided with electrodes crb1b, crb6b for capacitance elements, and electrodes lb22, lb30, lb2 for inductance elements.
- a fifth green sheet layer 305 is provided with electrodes crb1c, crb5c for capacitance elements, and electrodes lb10, lsp2d, lsp1d, lo1, lo2, li3 for inductance elements.
- a sixth green sheet layer 306 is provided with electrodes crb1d, crb5d for capacitance elements, and electrodes lb23, lb29, lb36, lb9, lb3, lb15, lsp2c, lsp1c, lo3, lc12 for inductance elements.
- a seventh green sheet layer 307 is provided with electrodes lb35, lb37, lb8, lb28, lb16, lb8, lb14, lb4, lsp2b, lsp1b, lo4, lc10, lc11 for inductance elements.
- An eighth green sheet layer 308 is provided with an electrode ch3 for a capacitance element, and electrodes lb25, lb34, lb38, lb27, lb7, lb17, lb13, lb5, lsp2a, lsp1a, lo5, lc9, lrbl, lrb2 for inductance elements.
- a ninth green sheet layer 309 is provided with an electrode ch2 for a capacitance element, and electrodes lh1a, lc5, lc8 for inductance element.
- a 10th green sheet layer 310 is provided with an electrode ch1 for a capacitance element, and electrodes lb26, lb33, lb39, lb6, lb18, lb12, lh1b, 1c4, 1c7, li1 for inductance elements.
- An 11th green sheet layer 311 is provided with electrodes lb32, lb40, lh1c, lc3, lc6, li2 for inductance elements.
- a 12th green sheet layer 312 is provided with electrodes crb7, crb6 for capacitance elements, and electrodes lb19, lb11, lc2 for inductance elements.
- a 13th green sheet layer 313 is provided with electrodes cb2, crb2b, crb4b for capacitance elements.
- a 14th green sheet layer 314 is provided with a ground electrode e2.
- a 15th green sheet layer 315 is provided with electrodes cb2, crb2b, crb4b for capacitance elements, and electrodes ld4, ld1, lbb3 for inductance elements.
- a 16th green sheet layer (lowermost layer) 316 is provided with a ground electrode e1.
- a bottom surface of the green sheet 316 is provided with terminal electrodes for mounting on a circuit board.
- the line electrodes for inductance elements, the electrodes for capacitance elements, and the ground electrodes are connected through via-holes formed in the green sheets.
- the symbols in Figs. 31 (a) to 31(c) are substantially identical to those in Figs. 20 and 24 , as shown in Table 7.
- the line electrode lh1 for an inductance element in Fig. 20 is constituted by the electrodes lh1a, lh1b, lh1c in Figs. 31(a) to 31(c) .
- electrodes constituting the bandpass filter connected to the antenna ANT are preferably disposed as distant from the high-frequency power amplifier circuit 6 as possible.
- electrodes constituting the balanced-unbalanced conversion circuits in the receiving path of wireless LAN and the transmitting/receiving path of Bluetooth are preferably disposed as distant from the high-frequency power amplifier circuit 6 as possible. This improves the reduction of unnecessary noise generated from the high-frequency power amplifier circuit 6, thereby improving the receiving sensitivity.
- the bottom surface of the laminate substrate 100 is provided with the ground electrode GND in a center portion, the antenna port ANT in a periphery, the transmitting port 11bg-T of wireless LAN, the receiving ports 11bg-R+, 11bg-R- of wireless LAN, the transmitting/receiving ports BLT-TR+, BLT-TR- of Bluetooth, Bluetooth ground port GND, the control ports Vc1, Vc2 for the high-frequency switch circuit, the power source ports Vc, Vb, Vdd for the high-frequency power amplifier circuit, and the output voltage port Vdet of the detection circuit.
- Fig. 32 shows the equivalent circuit of a high-frequency circuit device according to a still further example of the present invention.
- the circuit is the same as shown in Fig. 20 , except that the splitter circuit 9 is replaced by a coupler circuit 11.
- the coupler circuit 11 has a main line connected to the receiving circuit of wireless LAN, and a sub-line connected to the transmitting/receiving circuit of Bluetooth.
- the coupling ratio of the main line to the sub-line may be arbitrarily set. For instance, a ratio of the receiving circuit of wireless LAN to the transmitting/receiving circuit of Bluetooth may be set at 10:1.
- Fig. 33 shows the appearance of the high-frequency circuit device of Fig. 32
- Figs. 34(a) to 34(c) show the layer structure of its laminate substrate 101.
- the circuit in this example is the same as shown in Figs. 30 and 31(a) to 31 (c) , except that the splitter circuit is replaced by a coupler circuit.
- Mounted on the laminate substrate 101 is the resistance element rc of the coupler circuit in place of the resistance element rsp shown in Fig. 30 .
- an uppermost (first) green sheet 401 of the laminate substrate 101 is provided with land electrodes on which parts are mounted, and electrodes lcp2b, lcp1b for inductance elements.
- a second green sheet layer 402 is provided with a ground electrode e3.
- a third green sheet layer 403 is provided with electrodes crb1a, crb5a for capacitance elements, electrodes lb21, li4 for inductance elements, and a ground electrode 4.
- a fourth green sheet layer 404 is provided with electrodes crb1b, crb6b for capacitance elements, and electrodes lb22, lb30, lb2 for inductance elements.
- a fifth green sheet layer 405 is provided with electrodes crb1c, crb5c for capacitance elements, and electrodes lb10, lo1, lo2, li3 for inductance elements.
- a sixth green sheet layer 406 is provided with electrodes crb1d, crb5d for capacitance elements, and electrodes lb23, lb29, lb36, lb9, lb3, lb15, lcp2a, lo3, lc12 for inductance elements.
- a seventh green sheet layer 407 is provided with electrodes lb35, lb37, lb8, lb28, lb16, lb8, lb14, lb4, lo4, lc10, lc11 for inductance elements.
- An eighth green sheet layer 408 is provided with an electrode ch3 for a capacitance element, and electrodes lb25, lb34, lb38, lb27, lb7, lb17, lb13, lb5, lrb1, lrb2, lcp1a, lo5, lc9 for inductance elements.
- a ninth green sheet layer 409 is provided with an electrode ch2 for a capacitance element, and electrodes lh1a, lc5, lc8 for inductance elements.
- a 10th green sheet layer 410 is provided with an electrode ch1 for a capacitance element, and electrodes lb26, lb33, lb39, lb6, lb18, lb12, lh1b, lc4, lc7, li1 for inductance elements.
- An 11th green sheet layer 411 is provided with electrodes lb32, lb40, lh1c, lc3, lc6, li2 for inductance elements.
- a 12th green sheet layer 412 is provided with electrodes crb7, crb6 for capacitance elements, and electrodes lb19, lb11, lc2 for inductance elements.
- a 13th green sheet layer 413 is provided with electrodes cb2, crb2b, crb4b for capacitance elements.
- a 14th green sheet layer 414 is provided with a ground electrode e2.
- a 15th green sheet layer 415 is provided with electrodes cb2, crb2b, crb4b for capacitance elements, and electrodes ld4, ld1, lbb3 for inductance elements.
- a 16th green sheet layer 416 is provided with a ground electrode e1.
- a bottom surface of the lowermost green sheet 416 is provided with terminal electrodes for mounting on a circuit board.
- the line electrodes for inductance elements, the electrodes for capacitance elements, and the ground electrodes are connected through via-holes.
- the symbols in Fig. 34(a) to 34(c) are identical to those in Figs. 32 and 33 as much as possible.
- the coupler circuit lcp1 is constituted by lcp1a, lcp1b in the laminate, and lcp2 is constituted by lcp2a, lcp2b.
- a portion of the laminate substrate 100, on which the high-frequency power amplifier circuit 6 is mounted is preferably provided with thermal-vias TV for enhancing heat radiation from an upper surface to a bottom surface.
- the green sheets 202, 214, 216 are preferably provided with a wide ground electrode GND.
- electrode patterns constituting the circuit are preferably separated by via-holes connected to the planar ground electrode GND and the ground electrode GND, and avoid overlapping in a lamination direction, to prevent unnecessary electromagnetic interference with electrode patterns constituting the other circuit.
- Fig. 29 shows an example of the planar arrangement of such a circuit, with positional differences neglected in a lamination direction.
- the high-frequency circuit of the present invention commonly usable in at least two different communications systems using substantially the same frequency band, and the high-frequency circuit device and the communications apparatus comprising such high-frequency circuit are suitable for miniaturization, because of small numbers of parts.
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Claims (9)
- Hochfrequenzschaltung, die zwischen einer zum Senden und Empfangen in mindestens zwei verschiedenen Übertragungssystemen ausgelegten Antenne (ANT) und Sende/Empfangs-Schaltungen für mindestens zwei verschiedene Übertragungssysteme liegt, mit:einem Hochfrequenzschaltkreis (1) zum Schalten des Zweiwege-Anschlusses der Antenne (ANT) an einen Sendekreis und einen Empfangskreis für das erste Übertragungssystem (11 bg-T, 11 bg-R),gekennzeichnet durcheinen zwischen der Antenne (ANT) und dem Hochfrequenzschaltkreis (1) liegenden Splitter/Kopplerkreis (11) zum Verzweigen eines Signals von/zu der Sende/Empfangs-Schaltung für ein zweites Übertragungssystem (BLT-TR) undeinem zwischen der Antenne (ANT) und dem Splitter/Kopplerkreis (11) liegenden ersten Bandpassfilter (2) zum Unterdrücken von vom Empfangssignal verschiedenen Signalkomponenten und von beim Senden entstehenden Oberwellen und thermischem Rauschen.
- Hochfrequenzschaltung nach Anspruch 1, wobei das erste Übertragungssystem (11bg) ein drahtloses LAN-System und das zweite Übertragungssystem (BLT) ein Bluetooth-System ist und wobei das erste und das zweite Übertragungssystem im Wesentlichen das gleiche Frequenzband benutzen.
- Hochfrequenzschaltung nach Anspruch 1 oder 2 mit einer Symmetrisch/ Unsymmetrisch-Umsetzerstufe (3) zwischen dem Empfangskreis für das erste Übertragungssystem (11 bg-R) und dem Hochfrequenzschaltkreis (1).
- Hochfrequenzschaltung nach einem der vorhergehenden Ansprüche mit einer Symmetrisch/Unsymmetrisch-Umsetzerstufe (4) zwischen dem Sende/ Empfangskreis für das zweite Übertragungssystem (BLT-TR) und dem Splitter/ Kopplerkreis (11).
- Hochfrequenzschaltung nach einem der vorhergehenden Ansprüche mit einer Hochfrequenz-Leistungsverstärkerstufe (6) zwischen dem Sendekreis für das erste Übertragungssystem (11bg-T) und dem Hochfrequenzschaltkreis (1).
- Hochfrequenzschaltung nach Anspruch 5, mit einem Bandpassfilter zwischen der Hochfrequenz-Leistungsverstärkerstufe (6) und dem Sendekreis für das erste Übertragungssystem (11bg-T).
- Hochfrequenzschaltung nach Anspruch 5 oder 6 mit einer Symmetrisch/ Unsymmetrisch-Umsetzerstufe zwischen dem Sendekreis für das erste Übertragungssystem (11 bg-T) und der Hochfrequenz-Leistungsverstärkerstufe (6).
- A Hochfrequenzschaltungsgerät mit der Hochfrequenzschaltung nach einem der vorhergehenden Ansprüche mit einem Laminat aus dielektrischen Keramiken und Elektrodenmustern und mindestens einem auf dem Laminat montierten Halbleiterbauelement, wobei(a) die Elektrodenmuster mindestens einen Teil von Induktivitäts- und/oder Kapazitätselementen bilden, die hauptsächlich(1) das erste Bandpassfilter (2) und/oder die Symmetrisch/Unsymmetrisch-Umsetzerstufe,(2) das erste Bandpassfilter (2) und/oder den Splitter/Kopplerkreis (11) oder(3) das erste Bandpassfilter (2) und/oder die Symmetrisch/Unsymmetrisch-Umsetzerstufe und/der den Splitter/Kopplerkreis (11) bilden und(b) die Halbleiterbauelemente(1) den Hochfrequenzschaltkreis (1) oder(2) den Hochfrequenzschaltkreis (1) und/oder die Hochfrequenz-Leistungsverstärkerstufe bilden.
- Übertragungsgerät mit der Hochfrequenzschaltung oder dem Hochfrequenzschaltungsgerät nach einem der vorhergehenden Ansprüche.
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JP2004360126 | 2004-12-13 | ||
JP2005180706 | 2005-06-21 | ||
PCT/JP2005/022393 WO2006064691A1 (ja) | 2004-12-13 | 2005-12-06 | 高周波回路、高周波回路部品及びこれを用いた通信装置 |
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EP1826914A1 EP1826914A1 (de) | 2007-08-29 |
EP1826914A4 EP1826914A4 (de) | 2010-10-27 |
EP1826914B1 true EP1826914B1 (de) | 2017-03-01 |
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US (1) | US8131226B1 (de) |
EP (1) | EP1826914B1 (de) |
JP (1) | JP4930707B2 (de) |
CN (1) | CN101073208B (de) |
TW (1) | TWI449349B (de) |
WO (1) | WO2006064691A1 (de) |
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JP2004140696A (ja) * | 2002-10-18 | 2004-05-13 | Hitachi Metals Ltd | 高周波スイッチ回路およびこれを用いたアンテナスイッチモジュール、アンテナスイッチ積層モジュールならびに通信装置 |
JP4126651B2 (ja) | 2002-10-25 | 2008-07-30 | 日立金属株式会社 | 高周波スイッチモジュール及び複合積層モジュール並びにこれらを用いた通信機 |
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TWI226761B (en) | 2003-05-08 | 2005-01-11 | Ind Tech Res Inst | Dual band transceiver architecture for wireless application |
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-
2005
- 2005-12-06 EP EP05814211.8A patent/EP1826914B1/de not_active Not-in-force
- 2005-12-06 CN CN2005800416444A patent/CN101073208B/zh not_active Expired - Fee Related
- 2005-12-06 JP JP2006548778A patent/JP4930707B2/ja not_active Expired - Fee Related
- 2005-12-06 WO PCT/JP2005/022393 patent/WO2006064691A1/ja active Application Filing
- 2005-12-06 US US11/721,496 patent/US8131226B1/en not_active Expired - Fee Related
- 2005-12-12 TW TW094143828A patent/TWI449349B/zh not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
US8131226B1 (en) | 2012-03-06 |
EP1826914A1 (de) | 2007-08-29 |
JPWO2006064691A1 (ja) | 2008-06-12 |
WO2006064691A1 (ja) | 2006-06-22 |
EP1826914A4 (de) | 2010-10-27 |
CN101073208B (zh) | 2012-03-28 |
CN101073208A (zh) | 2007-11-14 |
TW200637189A (en) | 2006-10-16 |
TWI449349B (zh) | 2014-08-11 |
JP4930707B2 (ja) | 2012-05-16 |
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